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CVE Record

CVE-2021-38319: More From Google <= 0.0.2 Reflected Cross-Site Scripting

The More From Google WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to a reflected $_SERVER["PHP_SELF"] value in the ~/morefromgoogle.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 0.0.2.

MediumCVSS 6.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A vulnerable WordPress plugin can echo attacker-controlled page path data into a response. If a user follows a crafted link, malicious script could run in that user's browser. Business impact is mainly account/session risk and content manipulation, not server takeover.

Executive priority

Treat as a moderate web risk. It is not listed as actively exploited in the provided sources, but affected public WordPress sites should be remediated promptly because successful XSS can compromise user trust and privileged sessions.

Technical view

CVE-2021-38319 is reflected XSS in More From Google WordPress plugin through a reflected PHP_SELF value in morefromgoogle.php. Affected versions are up to and including 0.0.2. CVSS 3.1 is 6.1, requiring user interaction, with low confidentiality and integrity impact and no availability impact.

Likely exposure

Exposure is limited to WordPress sites with the More From Google plugin installed at version 0.0.2 or earlier. The bundle does not identify other affected products or supported fixed versions.

Exploitation context

The source bundle does not report active exploitation, and KEV is false. Exploitation would require a target user to interact with a crafted request, consistent with reflected XSS and the CVSS user-interaction requirement.

Researcher notes

Evidence identifies CWE-79 reflected XSS tied to PHP_SELF reflection in morefromgoogle.php. The bundle names affected versions through 0.0.2 but does not provide a confirmed patched version, proof of exploitation, or broader product impact.

Mitigation direction

  • Inventory WordPress sites for the More From Google plugin.
  • Remove or disable the plugin if it is not business-critical.
  • Check vendor or WordPress plugin guidance for a fixed version.
  • Prioritize sites with authenticated administrators or sensitive user sessions.
  • Monitor WordPress security advisories for updated remediation details.

Validation and detection

  • Confirm whether version 0.0.2 or earlier is installed.
  • Verify the plugin is removed, disabled, or updated per vendor guidance.
  • Review access logs for unusual requests targeting morefromgoogle.php.
  • Check browser security controls and WordPress hardening remain enabled.
  • Document any affected sites and remediation status.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2021-38319 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.1CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.1Medium
CVSS 3.1 vector shape for CVE-2021-38319Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
More From GoogleMore From Google0.0.2Listed
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.